final Flashcards
COPD
Air in, air gets trapped and they can’t get the air out
Secretions
CPOD & O2
Supplemental O2 removes a COPD patient’s hypoxic (low level of oxygen) respiratory drive causing hypoventilation which causes higher carbon dioxide levels, apnea (pauses in breathing), and ultimately respiratory failure.
asthma
Chronic airway inflammation = bronchial constriction
Wheezing and difficulty breathing
Tightness of chest
Can’t get CO2 out
Auscultate the lungs: inspiratory wheeze = inflammation & constriction
Appear cyanotic & edema
chronic bronchitis
Continuous inflammation of bronchi
Excessive secretion of mucus
emphysema
Alveolar wall destruction & enlarged air spaces
Overinflation of air sacs
Decreases working the alveoli and impaired gas exchange between O2 & CO2
bronchodilators
B-adrenergic agonists (blue container)
Anticholinergic drugs (green container)
Xanthine derivatives
non-bronchodilators
Corticosteroids
Leukotriene receptor antagonists (LTRAs)
B – adrenergic agonists (quick symptoms relieve) indications
Used to treat severe bronchospasm
Emergency medication
For quick relief of symptoms
B – adrenergic agonists mechanism of action
Relaxes bronchial smooth muscles which causes dilation of bronchi & bronchioles
Imitates norepinephrine on B2 cells = causes vasodilation & increases airflow
B – adrenergic agonists examples
Salbutamol (ventolin) short acting (main)
Salmeterol xinafoate (serevent) long acting
Combination (steroid & B-adrenergic – symbicort or advair)
B – adrenergic agonists adverse reactions
Tachycardia
Palpitations
Tremor
Nervousness / anxiety
Hypertension / hypotension
Headache
If used too frequently, dose-related adverse effects may be seen because B-adrenergic loses its B2 specific action, especially at larger doses (t/f)
TRUE
Anticholinergics (slower) indications for use
Maintenance & prevention of bronchospasm
Bronchodilator
Not 1st line treatment for acute symptoms, use after salbutamol!!!
what is the order of medications for respiratory
blue (salbutamol) and then green (ipratropium)
anticholinergics mechanism of action
Prevents bronchial constriction by blocking acetylcholine (Ach) receptors
Block constriction
Reduce secretions
Onset: 5-15mins, peak 2-3hr
anticholinergic examples
Ipratropium bromide (atrovent)
Tiotropium bromide monohydrate (spiriva)
Salbutamol & ipratropium combination (combivent)
anticholinergic adverse effects
Dry mouth or throat
Nasal congestion
Heart palpitations
Urinary retention
GI problems
Increased intraocular pressure
Headache
Coughing anxiety
Xanthine derivatives indication of use
Used with chronic bronchitis & emphysema
For prevention of symptoms
Xanthine derivatives mechanism of action
Causes bronchodilation by inhibiting phosphodiesterase enzyme results in smooth muscle dilation
Xanthine derivatives examples
Theophylline (oral medication
Aminophylline (IV only)
Theophylline considerations
Short therapeutic window between therapeutic and toxic
Blood work done frequently
Aminophylline special use
Used for status asthmaticus
Xanthine derivatives adverse effects
Cardiac irregularities
Tachycardia, palpitations, ventricular dysrhythmias
GERD – nausea, vomiting, anorexia
Increased urination
Hyperglycemia
Corticosteroids indications of use
Anti-inflammatory (major)
For management of difficult to treat asthma/resp illnesses
Allergic rhinitis
corticosteroids mechanism of action
Controls inflammatory responses
Increases the effects of B-agonists (bronchodilation)
corticosteroids examples
Budesonide (pulmicort), fluticasone propionate (flovent), prednisone, combination with B-agonist-advair
corticosteroids adverse effects
Pharyngeal irritation
Cough & dry mouth
Oral fungal infections
PO corticosteroids provide more systemic effect & therefore adverse effects are more systemic
Susceptibility to infection
Fluid and electrolyte imbalance
Endocrine effects (including hyperglycemia)
Osteoporosis
Leukotriene receptor antagonists indications of use
Used for the prophylaxis and long-term treatment and prevention of asthma
Seasonal allergies/asthma
Leukotriene receptor antagonists examples
Montelukast (singulair) orally OD
Zafirlukast (accolate) orally BID
Leukotriene receptor antagonists adverse effects
Nausea
Diarrhea
Headache
Nightmares
Liver dysfunction
Nursing assessment respiratory
Resp assessment
Colour, accessory muscle, O2 sats, resp rate, cough, sputum, cyanotic
Environmental exposures & allergens
Smoking habits
Emotional status (anxiety, stress, fear)
Allergies
Caffeine intake
Increase in adverse effects (salbutamol)
interventions for respiratory
Discuss adherence to medication regimen
Demonstrate proper administration of inhaled drugs
Reassess respiratory status & breath sounds
Instruct pt to rinse mouth with water after use of inhaler or nebulized drug
(Esp steroid and anticholinergic to prevent dryness and mucosal irritation)
Wash inhaler, spacer, and nebulizer qweekly with warm soapy water
Pt education
how to use medications (puffers)
2 puffs of same medications = 1-2 mins b/w each puffs
Can put 2 puff in aerochamber
2 different medications = 2-5 mins b/w medications
Exhale, inhale & puff, hold 10 secs, exhale, repeat
adrenal gland medications
- cortex = corticosteroids (glucocorticoids, mineralocorticoids)
- medulla = epinephrine, norepinephrine
Corticosteroid levels regulated by
hypothalamic-pituitary-adrenal (HPA) axis (give steroids in morning as they reflect HPA)
HPA order
Level of cortco low –> corticotropin releasing hormone released from hypothalamus –> anterior pituitary –> ACTH released –> adrenal cortex –> production of corticosteroids reach peak level —> signal sent to hypothalamus –> HPA inhibited
Glucocorticoids
- major inflammatory actions
- regulates carbo, protein, lipid metabolism
- maintenance BP
mineralocorticoids
- BP control
- maintenance pH levels
Adrenal system over-secretion
Cushing’s syndrome – over secretion of adrenal hormones
Glucocorticoid hypersecretion
redistribution of body fat from arms & legs to face, shoulders, trunk, and abdomen, characteristic “moon face”
Aldosterone hypersecretion
increased water & Na retention & muscle weakness from K loss
causes of adrenal over secretion
tumor, excessive administration of steroids
Adrenal system under-secretion
Addison’s disease
Under secretion of adrenal hormones (Decreased blood Na & glucose levels, increased K levels )
symptoms addisons disease
Hyperpigmentation, weakness, headache, fatigue, nausea & vomiting, anorexia, dehydration, weight loss, confusion, fever, abdo pain, diaphoresis, low BP
Mineralocorticoids mechanism of action
Acts on distal kidney tubule –> sodium reabsorption into blood –> pulls water & fluid with it –> help regulate edema & BP (HTN)
Promotes H & K excretion
Helps regulate blood pH
mineralocorticoids used for
addisons disease
Glucocorticoids examples
hydrocorticsone, cortisone, prednisolone, dexamethasone
Glucocorticoids mechanism of action
Inhibition of inflammatory & immune responses
Promote breakdown of protein, production of glycogen in liver, & redistribution of fat from peripheral areas to central areas of body
how does glucocorticoids inhibit or control inflammatory response
- stabilizing cell membranes of inflammatory cells
- decreasing permeability of capillaries to inflammatory cells
- decreasing migration of WBCs into inflamed areas
Indications of corticosteroids
Adrenocortical deficiency
Bacterial meningitis
Cerebral edema
Collagen diseases (systemic lupus erythematosus)
Dermatological diseases
Endocrine diseases (thyroiditis)
GI diseases (ulcerative colitis)
Ocular disorders
Leukemia & lymphoma
Bronchospasms (via inhalation route)
Allergic rhinitis (nasal route)
Inflammations of ear, eye, skin (topical route)
Exacerbation of chronic respiratory illnesses (asthma & COPD)
nursing assessment steroids
Assess nutritional & hydration status, baseline weight, intake & output, VS, skin condition, immune status
Assess muscle strength
Baseline lab values
Avoid alcohol, caffeine, aspirin, NSAIDs
nursing interventions steroids
Healing may be decreased with long term therapy
Avoid contact with people with infections
Assess therapeutic response & adverse effects to monitor effectiveness
ADDISONIAN CRISIS
Oral given with milk, food, and antacids
IM = administered into large muscle with rotation of sites
Topical = skin clean & dry, gloves worn
Nasal = clear nasal passage first, pt breathes in through nose with administration
Inhaled = fungal infections common, rinse mouth with water
when is the best time to give glucocorticoids
Best time to give exogenous glucocorticoids is early in morning = minimizes adrenal suppression
pt education steroids
Never stop taking medications abruptly or alter dose
Long term effects of glucocorticoid therapy
Bone health & prevention of falls
Signs and symptoms of acute adrenal insufficiency
Document response to treatment, BP, daily weight, adverse effects
Maintain low sodium & high potassium diet
Anxiolytics
promote relaxation, decreased anxiety
Sedatives – hypnotics
Promote relaxation and induce sleep
Anxiolytics used for sleeping referred to a
sedative-hypnotics
difference b/w anxiolytics & sedatives
depends on dose
what kind of drugs used to treat anxiety and insomnia
benzos
what is the antidepressants used to treat insomnia
trazodone
Daytime anxiety can manifest as a
nighttime sleep disturbance – unable to turn off their worries
Lack of sleep can present as anxiety, fatigue, and decreased functioning
TRUE
Anxiety – pathophysiology
Excess of excitatory neurotransmitters (norepinephrine) or deficiency of inhibitory neurotransmitters (GABA)
Neuroendocrine factors also play role – when under stress, corticotropin releasing factor (CRF) increases release of norepinephrine
Serotonin also involved, hence effectiveness of SSRIs treating anxiety
benzo OD fatal or nonfatal?
not fatal unless combo w/ CNS depressants
benzo used for
sedation, reduce anxiety, muscle skeletal relaxation, anticonvulsant effects
benzo potentiates
GABA
GABA calms you, calms down dopamine
do benzo supress rem sleep
NOOOOOOO
Diazepam, flurazepam, and chlordiazepoxide form active metabolites that have long-acting half-lives (>24hrs) & tend to
accumulate, especially in older adults or those with impaired liver function
Alprazolam, lorazepam, clonazepam, oxazepam, and temazepam have intermediate acting ½ lives 6-24hrs which
don’t have active metabolites and generally do not accumulate
Midazolam & triazolam have short acting ½ lives <6 hours(t/f)
TRUE
diazepam used effectively in TX
GAD, muscle relaxant, alcohol withdrawal
lorazepan used to TX
GAD, agitation, alcohol withdrawal
midazolam
IV only (sedation, anaesthesia)
clonazepam
seizures, panic, agitation, mood stabilizer
benzo disadvantages
Potentially habit forming & addictive – limit to 2 week use
Shouldn’t be used beyond 4 weeks
Some have long ½ life & can accumulate
Memory & intellectual impairment
Hangover
Reduced motor coordination
Paradoxical confusion, agitation, insomnia especially with pediatric & other adult clients
adverse effects benzo
CNS effects (Diplopia, tremors, ataxia (impaired coordination), drowsiness, headache, nausea, vomiting)
Autonomic effects
(Changes in libido, constipation, incontinence, urinary retention, hypotension, tachycardia, nasal congestion)
Accumulations effects
(Confusion, hypoactivity, intellectual impairment)
Mild withdrawal symptoms occur within
6-12 weeks
mild withdrawal sx
Anxiety, panic, hand tremors, sweating restlessness, insomnia, weakness, aches, pains, blurred vision, palpitations
severe withdrawal sx
Irritability, agitation, rage, nervousness, diarrhea, vomiting, sweating, seizures
TX of withdrawal of benzo w/
benzo
to prevent withdrawal of benzo
taper drug by 10-25% every 1-2 weeks over 4-16 weeks
drug to reverse benzo toxicity
flumazenil
chloral hydrate suppress rem
NO
chloral hydrate mechanism of action
GABA
chloral hydrate s/e
drowsiness, N & V. stomach pain, headache
zopiclone
Differs structurally from benzos but has a similar effects, binds with benzo receptors
Indicated for symptomatic relief of transient & short term (7-10 days) insomnia characterized by difficulty falling and remaining asleep, and/or early morning awakenings
zopiclone and REM sleep
Delayed onset of REM sleep, does not reduce total duration of REM periods
considerations with zopiclone
Should not be prescribed in quantities larger than 1 month
Risk of dependence
Overdose can be fatal
Rebound insomnia common
Taper slowly
Less side effects than other sedative hypnotics
antihistamine mechanism of action
bind to HA receptor to reduce negative symptoms
antihistamines s/e
- drowsiness, dry mouth, urinary retention, blurred vision, paradoxical effects
dimenhydrinate
gravol
diphenhydramine
benadryl
Nursing process, patient teaching sedatives
Nursing Implications for all sedative/hypnotics:
Use with caution in the elderly and pediatric populations
Baseline vitals – including postural B/P
Hypnotics: 15-30 minutes pre bedtime for maximum effectiveness
Avoid ETOH and other CNS depressants
Avoid grapefruit juice
Pregnancy and breast feeding
hematopoiesis
Formation new blood cells (red, white, platelets)
Hemoglobin = O2 and remove CO2
Hematocrit
Important marker for anemia
Percentage of WBC & RBC in blood
lifespan of RBC
Lifespan = 120 days (significant)
More than 1/3 made of hemoglobin
anemias
Maturation defects (120 days (lifespan))
Excessive destruction of RBCs (hemolytic anemias)
maturation defects
Lack of B12 or folic acid
Blood loss, child birth, GI bleeding, periods
Cytoplasmic
Nuclear
Excessive destruction of RBCs (hemolytic anemias)
Genetic deficit = sickle cell disease (immature RBC)
Intrinsic RBC abnormalities = Sickle cell
Extrinsic mechanisms = Mechanical (blood loss)
Erythropoiesis – stimulating agents (stimulates RBC production from bone marrow)
Epoetin alfa
Biosynthetic form of hormone erythropoietin (produced in kidney)
Erythropoiesis – stimulating agents treat
anemia associated end-stage renal disease, chemo – induced anemia, anemia associated with antiretroviral medications
Erythropoiesis – stimulating agents ineffective w/o adequate
iron stores & bone marrow function
You must be able to be able to store iron (ferritin)
Erythropoiesis – stimulating agents contraindications
Allergy
Hypertension
Hemoglobin levels
Head and neck cancers
Thrombosis
hemoglobin levels for Erythropoiesis – stimulating agents
100mmol/L for cancer pt
130mmol/L for pt w/ kidney disease (Don’t want pt to have if hemoglobin too high = Too high = viscosity)
adverse effects Erythropoiesis – stimulating agents
Hypertension, fever, headache, pruritus, rash, N & V, arthralgia (joint stiffness), injection site reaction
iron
O2 carrier in hemoglobin & myoglobin
Iron & oxygen binding protein in the muscle
Foods enhance absorption iron
Orange juice, veal, fish, ascorbic acid
Foods impair absorption iron
Eggs, corn, beans, cereal products containing phytates
Oral iron are available as ferrous salts
(fumarate (33% iron), sulphate (20% iron), gluconate (11.6% most common))
iron indications
Prevention & treatment of deficiency
Admin alleviates symptoms of anemia but underlying cause of anemia needs to be corrected
adverse effects of iron
Nausea, vomiting, diarrhea, constipation, stomach cramps, pain
Most common cause of pediatric poisoning (Schedule 2)
Black darkened stools (dark green)
Temp discolour teeth (liquid oral)
Injectable (pain upon injection)
Toxicity iron
Symptomatic & supportive measures
Suction & maintenance of airway
Correction of acidosis
Control of shock & dehydration with IV fluids or blood
Oxygen
Vasopressors
Severe symptoms (coma, shock, seizures) = Chelation therapy w/ deferoxamine mesylate
dextran
Anaphylactic reactions (major orthostatic hypotension & fatal)
Test dose of 25mg admin before full dose then remainder given 1 hr after
Ferric gluconate
Indicated for repletion of total iron content in pt w/ iron deficiency anemia undergoing hemodialysis
Risk of anaphylaxis is much less than dextran
Doses higher than 125mg associated with increased adverse effects = Abdominal pain, dyspnea, cramps, itching
Folic acid
B-complex vitamin (B9)
Essential for erythropoiesis
primary uses folic acid
Deficiency
During pregnancy = prevent neural tube defects (Trying to get prego = take 1 month before)
Cyanocobalamin – vitamin B12
Treat pernicious anemia & other megaloblastic anemias (large, abnormal, immature RBCs)
B12 & folic acid = building blocks for RBC (t/f)
TRUE
Nursing process: assessment anemia
Pt history & medications, allergies
Assess potential contraindications
Assess baseline lab values, especially hemoglobin, hematocrit
Obtain nutritional assessment
Hematochezia = Frank or fresh blood in stool
Dextran contraindicated in all anemias except for
iron-deficiency anemia
Interventions anemia
Liquid preparations = follow manufacturer’s guidelines on dilution & administration
Instruct pt to take liquid iron through a straw to avoid staining tooth enamel
Oral forms taken b/w meals for max absorption by can be taken with meals if GI distress occurs (Given with juice NOT milk or antacids = Because milk & antacids create a barrier)
Avoid esophageal corrosion = remain upright for 30 mins after
Pt encouraged to eat foods high in iron & folic acid
Triglycerides
energy sources & stored in adipose tissue